"On Labour's watch - the Argentinians were firmly told it was not a good idea to invade the Falklands"

LOL did you read the BBC article that someone provided a link for? Read the final paragraph - The Lord Chancellor's advice to Calaghan's Government regarding the military assets sent to "excercise" down in the South Atlantic - Something to the tune of - If while you are down there and you see an Argentine, run away - firmly told indeed What a bloody joke!!!

The perception that the British would not fight for the Falklands was formed long before Thatcher or the Conservatives came to power.

As for the people of the Republic of Ireland wanting a United Ireland? That is not how you put it in the original post where you brought that up was it? As an asperation the people of the Republic of Ireland have voted to leave whether Ireland is ever united up to the people of Northern Ireland who have to vote for it first.